User's Manual

TD-W8151N 150Mbps Wireless N ADSL2+ Modem Router User Guide
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 DHCP Relay: Select Relay, then you will see the next screen (shown in Figure 4-17), and the
Router will work as a DHCP Relay. A DHCP relay is a computer that forwards DHCP data
between computers that request IP addresses and the DHCP server that assigns the
addresses. Each of the device's interfaces can be configured as a DHCP relay. If it is enabled,
the DHCP requests from local PCs will forward to the DHCP server runs on WAN side. To
have this function working properly, please run on Router mode only, disable the DHCP
server on the LAN port, and make sure the routing table has the correct routing entry.
Figure 4-17
 DHCP Server IP for Relay Agent: Enter the DHCP server IP Address runs on WAN
side.

Note:
If you select Disabled, the DHCP function will not take effect.
 Radvd: Radvd (Router Advertisement Daemon) is provided to assign IPv6 addresses to the
computers in your LAN. This function is disabled by default. Enable this function if needed.
 Radvd Enable: Select this option to Enable/Disable Radvd. Select Enable, and then you
will see the screen below (shown in Figure 4-18).
Figure 4-18
 Radvd Mode: Select Radvd Mode. Select Auto, you will see Figure 4-18. Select Manual,
you will see the screen below (shown in Figure 4-19).
 Auto Prefix: The Auto
Prefix function is enabled by default. When DHCP PD (shown in
Figure 4-11) is enabled, Auto Prefix function is available.
Figure 4-19
 Prefix/length:
Enter an IPv6 address prefix, and length of the prefix.
 Preferred Lifetime: The preferred lifetime for the prefix. The default value is 604800